Thresher-concave.



G. E. STORER.

THRESHER UONCAVE. APPLICATION FILED JAN. 19, 1909.

934,106. Patented se t.14.1909.

2 SHEETS-SHEET 1.

ANDREW. a. GRAHAM 00., PuoTo-umoaRAPnERa. WASHINGION. u c.

O. E. STORE-R.

THRESHER GONGAVE.

APPLICATION FILED JAN. 19, 1909.

Patented Sept. 14, 1909. 2 SHEETS-SHEET 2.

W I 'nfientoz Huh wan:

ANDREW. a. mmmn 00.. ruovo umoamwens. wnnlucwn. D- c.

CHARLES E. STORER, OF KEARNEY, NEBRASKA.

THRESHEB-CONCAVE Specification. of .Letters Patent.

Application.filed lanuary 19, 1909s Serial No. 473,051;

To altwhom-it may concern:

Be it known that 1, CHARLES E. S'roRER, a citizen of the United States,- residing. at

Kearney, in the county of Buffalo and State of hebraska, have invented-certain new and usefnl 11-111310\0l1'1011t$ in 'lhresher Concaves,

of which the following is a specification, reference being had. to theaccompanying drawings.

This iuventionrelates to improvements in concaves for threshing inachinesand par ticularly to the productiolrof an adjustable concave.

One of the ob ects of the invention isthe productioirofa concavew-hich maybe read-y il y changed so asto alternately bring a blank concave section or a toothed concave section into operative position with TBlfltlOll to the thresher cylinder.

Another object of the invention is the production of a concave comprising a toothed and a blank section and means for rocking one section out of operative position and the other section simultaneously into operative position.

Vith the above and other objects in View this invent-ion comprises certain combinations, constructions and arrangements of parts clearly described in the following specification and illustrated in the accompanying drawings, in which,

Figure l is a vertical longitudinal sectional view through the front end of a thresher, Fig. 2 is a similar View showing the concave section in different positions, Fig. 3 is a transverse sectional view taken on the plane indicated by the line 33 in Fig. 1. Fig. 4 is an end view of a gear and rocker arm for rocking a concave section, Fig. 5 is a detail face view of a concave section, and Fig. 6 is a detail view of a gear rack.

In the accompanying drawings which are prepared for illustrative purposes and are accordingly not drawn to scale, the cylinder is designated by 1 and is supported on a shaft 2 suitably journaled to the sides of the 1 machine, said cylinder being provided with the usual thresher teeth 3. Located beneath the cylinder and suitably supported on the machine is a fixed concave section 4 which is provided with upwardly projecting thresher teeth 5. The concave section 4t is preferably located adjacent to the feed board (3 and is pan 1 formed-with-tl1e=iisual grain slots through which graiirmay pass to the accumulator located beneath thecylinder and concave section 4-.

l ixe'd'to the sides Of the machine is a frame-8having-spaced arcuate slots in its end walls and provided with a longitudinally extending rack 9,-locatedon its bottom por tion. Extendingacross theframe8 is a pair of shafts 10 and -11 having their opposite :ends arranged for movement in the arcuate \slots of the-- frame end walls.

Mounted on theiends oftheshafts l0 and 11 is a plurality of mutilatedgears-12 which are-*adapted-to engage with thegea r rack 9.

Patented-Sept 14,1909.

Supportedon the shaft 10 isa pair of substantially right angularly connected concave sections -13 2111Cl'l1;SCt1011 13 belng formed with laterally projecting teeth 15 and section H being formed blank. Supported on the shaft 11 is a second set of similar concave sections 16 and 17, section 16 being provided with teeth 18 and section 17 being formed blank, and both sets of concave sections being formed with the usual grain slots.

Connected to each set of the concave sections is an arm 19 and connected pivotally to the arms 19 is a pair of operating rods 20 and 21, the rod 20 being formed somewhat longer than rod 21 and formed with an angularly bent end 22, and arranged to engage with a suitable holding means. As illustrated, the rods 20, 21 project through openings in the frame of the machine and have their bottom edges notched for engagement with the bottom walls of said openings, whereby they are held against longitudinal movement to retain the movable concave sections in adjusted position.

Then the concave sections 13 and 16 are held in operative position the sections 1 1 and 17 will depend on the frame 8, with the rear end of section 13 held against the upper edge of section 17. By suitably manipulating the operating rods 20 and 21 the sections 13 and 16 may be independently or jointly moved out of the position shown in Fig. 1 and into the positions shown in Fig. 2 and the blank sections 14 and 17 brought from an inoperative to an operative position, these changes being effected by the rocking of the concave sections through the radial movement of the mutilated gears 12 over the gear 1. A concave for threshing machines com 7 prising a movable concave section consisting havin ofangularly connected members or surfaces, a shaft for sa1d movable concave sectlon, a frame having arcuate slots to receive said shaft, a gear fixed to the shaft, a stationary gear rack for engagement byvsaid gear and means for moving the gear over the gear rack, whereby either one of the members or surfaces of the movable concave section may be brought into operative position.

2. In combination, a rotary cylinder, a fixed concave section to co-acttherewith, a movable concave sectionconsisting of angularly connectedmembers or surfaces, a shaft forsaid movable concave section, a frame arcuate slots to receive said shaft, a gear 'Xed to the shaft, a stationary gear rack for engagement by saidgear and means for moving the gear over the gear rack, whereby either one of the members or surfaces of' the movable concave section may be brought into operative position.

3. In combinatlon, a rotary cylinder, a fixedconcave section to co-act therewith, a

movable concave section consisting of angularly connected members or surfaces, aishaft for the movable concave section, a frame having arcuate slots to receive the shaft, a

gear'fixed to the shaft, a stationary gear rack for engagementby the gear, an arm carried fixed concave section, a lu rality'of movable concave sections, each 0 the latter consisting of angularly connected membersor surfaces,

shafts for said movableconcavesections, a frame having arcuate slots to r'eceive said shafts, gears upon'said shafts, a gear rack to V be engaged by sai d' gears, and means .for moving said gears over the gear rack to drop one surface of each of the movable concave sections into operative position, the connected surfaces of the movable concave sec tions being thereby moved out'of operative position.

In testimony whereof 'I hereunto V affix m signature in the presence of two itnesses.

, CHARLES E. :STORER.

lVitnesses: V V V EDGAR S'roRER,

J. A. BoYD. 

